Apr 25, 2008 - "This election," Bill Clinton said in the hours before the Pennsylvania primary, "is too big to be small." It was a noble sentiment, succinctly stated, and the core of what Democrats believe -- that George W. Bush has been a historic screwup as President, that there are huge issues to be confronted this year. But it was laughable as well. The Pennsylvania primary had been a six-week exercise in…